<!DOCTYPE html>
<div style="width:40em; height:21em; line-height:2em;">
    <div style="float:left; width:50%; height:100%;">
        First column<br>
        First column<br>
        First column<br>
        First column<br>
    </div>
    <div style="float:left; width:50%; height:100%;">
        <img style="display:block; width:100%; height:14em; background:green;">
        Second column<br>
        Second column<br>
        Second column<br>
    </div>
</div>
